“The costume is a flag, but the way we’re getting around that is we have Steve Rogers forced into the USO circuit,” Johnston said. “After he’s made into this super-soldier, they decide they can’t send him into combat and risk him getting killed. He’s the only one and they can’t make more. So they say, ‘You’re going to be in this USO show’ and they give him a flag suit. He can’t wait to get out of it.”

He added that “When he does go AWOL, he covers up the suit but then, after a few things happen, he realizes that this uniform allows him to lead. By then, he’s become a star in the public mind and a symbol. The guys get behind him because he embodies something special.”

Which leads to a new costume: “In the first USO sequences, the frustrated patriot will be wearing a version that is closer to the classic Jack Kirby-designed costume, but then later as the super-soldier hits the war zone he will be wearing a sturdier, more muted version that he makes himself that is more like battle togs. The stripes across his mid-section, for instance, will be straps, not colored fabric.”

You can read more of what he said about the costumes and how many actors they are looking at by going here.